Add more details to the search result window

[pidgeon777]

Eclipse, when searching for references in a C++ project, shows the following information:

1- Text of the line where the hit has occurred
2- Hit highlighted in bold with a different color
3- Line number of the hit
4- File in which the hit has occurred
5- Name of the function where the hit has occurred
6- Number of hits for each file in which the hit has occurred (format: +main.c (21 matches), +main.h (13 matches)... + is the button to expand/collapse the search results tree)

It appears that NppGTags is correctly implementing point 1 to 4, but it would be very nice to also add point 5 (and maybe 6).